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.\" Common Development and Distribution License ("CDDL"), version 1.0.
.\" You may only use this file in accordance with the terms of version
.\" 1.0 of the CDDL.
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.\" Copyright 2015 Joyent, Inc.
.\"
.Dd November 27, 2023
.Dt PR_DOOR_INFO 3PROC
.Os
.Sh NAME
.Nm pr_door_info
.Nd inject door_info library call into victim process
.Sh LIBRARY
.Lb libproc
.Sh SYNOPSIS
.In libproc.h
.Ft int
.Fo pr_door_info
.Fa "struct ps_prochandle *P"
.Fa "int did"
.Fa "struct door_info *info"
.Fc
.Sh DESCRIPTION
The
.Fn pr_door_info
function injects the
.Xr door_info 3C
library call into the target process
.Fa P
by means of the agent LWP.
If the process handle
.Fa P
is
.Dv NULL
then this is equivalent to calling
.Xr door_info 3C
on the currently running process.
.Pp
The arguments
.Fa did
and
.Fa info
have the same meaning as in
.Xr door_info 3C .
See
.Xr door_info 3C
for the full description and purpose of the
.Sy door_info
library call and its arguments.
.Pp
The
.Fn pr_door_info
function only works on active processes.
Process handles that correspond to core files, zombie processes, or ELF objects
do not support library call injection.
.Sh RETURN VALUES
Upon successful completion, the
.Fn pr_door_info
function's return value is that described in
.Xr door_info 3C .
Otherwise,
.Sy -1
is returned and
.Sy errno
is set to
.Er ENOSYS
to indicate that the library call could not be injected.
.Sh ERRORS
For the full list of errors see the
.Sy ERRORS
section in
.Xr door_info 3C .
.Pp
The
.Fn pr_door_info
function will fail if:
.Bl -tag -width Er
.It Er ENOSYS
An error occurred while trying to invoke the agent LWP and inject a
library call in the process handle
.Fa P
or the process handle
.Fa P
does not support library call injection.
.El
.Sh INTERFACE STABILITY
.Sy Uncommitted
.Sh MT-LEVEL
See
.Sy LOCKING
in
.Xr libproc 3LIB .
.Sh SEE ALSO
.Xr door_info 3C ,
.Xr libproc 3LIB ,
.Xr proc 5
